Tractor



L. F. NIELSEN.

TRACTOR. 7

APPLICATION FILED MAY 26, 1919.

1,384,968., Patented July 19, 1921.

2 SHEETSSHEET 1:

Q/L MW L. F. NIELSEN.

TRACTOR.

APPLICATION FILED MAYZG, 1919.

1 184,968. Patented July 19, 1921.

2 SHEETS-SHEET 2- his fi/farrreys LAURITZ F. NIELSEN, OF MINNEAPOLIS,

MINNESOTA, ASSIGNOR T0.THE ALLIED TRACTOR/S COMPANY, OF MINNEAPOLIS, MINNESOTA, A CORPORATION.

TRACTOR.

ii,384t,968.

Application filed May 26,

To all 10 how it may concern Be it known that I, LAURITZ F. NIELSEN, a citizen of the United States, residing at Minneapolis, in the county of Hennepin and State of lvfinnesota, have invented certain new and useful Improvements in Tractors, of which the following is a specification.

My invention relates to tractors and particularly to tractors having two large driving wheels at the front and two smaller steering wheels at the rear. An object is to so construct the driving wheels and the mechanism associated therewith that shocks and strains incident to starting the tractor and shifting the gears will'be eliminated.

The full objects and advantages of my invention will appear in connection with the detailed description thereof and the novel features embodied in my inventive idea will be particularly pointed out in the claims.

Referring to the accompanying drawings,-

Figure 1 is a top plan view with certain of the parts in section. Fig. 2 is a section on line 55 of Fig. 1.

In carrying out my invention I provide a frame consisting of two longitudinal beams having front parallel portions 10 and rear portions 12 which converge so as to approach each other at their rear ends where they are secured together by a bracket 14. The longitudinal members are secured to gether by the intermediate transverse members 16 and 18 and a front transverse memher 20. The frame is supported at its front by two driving wheels rotatably mounted on a stationary shaft 24 which is secured to the members 10 of the frame. The rims 22 of the driving wheels are connected to hubs 26 by spokes 27, and the hubs are provided with roller bearings 28 separated by spacers :29 and upon the inner ends of the hubs are mounted cup-shaped members 30 capable of turning movement on the hubs for a purpose now to be described. WVithin the cup-shaped members are internal gears 32 upon the innor surface of their rim portions 34. The rim portions 34 are provided on their outer surface with four pairs of lugs 36, and between the pairs of lugs extend bolts 88 as best shown in Fig. 2. Pairs of coiled springs are placed on the bolts 38, the springs of each pair being spaced apart at the1r inner ends to receive between them inturned lugs 42 provided with holes by which they are Specification of Letters Patent. Pai mmflgdl July 3%}, 19231 1919. Serial No. 299,692.

slidably mounted on the bolts 88. The lugs 42 are carried by rods or bars 4.4L which at their outer ends are secured to the rims 22 ings 52 by which they are rotatably supported in the transmission casing. The differential mechanism includes the driving gears 54 and 56, the gear 56 beinglarger than gear 5 1. A shaft 58 mounted in the transmission casing has secured to one endthereof a beltpulley 60, whiletwo gears 62- and 66 are slidably mounted on this shaft by a splinefid so that the gear 62 may be meshed with the gear 5% for fast speed the gear 66 may be meshed with the gear 56 for slow speed, and the gear 66 may be meshed with a gear 68 for reversing the direction of travel of the tractor. The gear 68 is secured to a countershaft 70 upon which is also secured a gear 72 meshing with the gear 56. A beveled gear 7% secured to the shaft 58 meshes with abeveled gear 76 which is secured to the front end of the engine shaft of the engine78. which maybe any suitable type of internal combustion engine. The gears are shifted by the following mechanism. A handle 80 within reach of the operator on the seat 82 at the rear of the tractor is secured to the rear end of a rod' 84; suitably mounted in a bracket 86 and in a housing or shifter box 88 for both racking and sliding movement. The rod ea serves to operate the forked rod 98 to slide the gear 62, and also serves to operate the forked rod 104- to slide the gear 66. Liability of injuring the gears is decreased by relieving the strain on the gears when the tractor is started either in forward or backward direction on account of the resiliency of the springs 4:0. The provision of these springs decreases the various shocks and strains incident to shifting the gears and starting the tractor. In order to prevent wear on the gears 32 and 46 due to the presence of grit and dirt, the cup-shaped member 30 within which these gears are located is provided with a cover 106 which fits within the rim portion 34. The periphery of the cover is provided with a groove in which is placed a packing 108 which insures a tight jolnt and makes'the'casing dust-proof; The outer foregoing description, On account of the yielding connections for operating the driv ing wheels, shocks and jerking are to a large extent eliminated and the arrange ment of gear-shifting mechanism also decreases liabilityof jerking and injury to the g arsaz- The nclosure-e h gea s o operatingthedrivingwheels in a dust-proof casing'deereases the W831'-:OI1 these-gears.

Icla1m: v

1. In tractor the combination of a st'ationary lshaft, driving wheels rotatably mounted on said shaft, cup shaped members mounted for yielding movement on the hubs of said driving, wheels, pairs of lugs on the outside of said cup-shaped members, cushioning means between said pairs of lugs,

pairs of rigid members attached at their outer ends to the rims of said driving wheels and yieldingly connected at their-inner ends through said cushioning means wlth said zcup shaped members, and means for driving saidcup shaped members.

2. In a tractor the combination of a sta tionary shaft, driving wheels rotatablyi mounted on said shaft,cup shaped members :mounted for yielding movement on the hubs of said: driving wheels, pairs of lugs on the outside of said cup-shaped members, bolts connecting sald pairs of lugs, pairs of rigid members attached at their outer ends to the ,rimsiof said driving Wheels and slidably mounted attheir inner endsupon sald bolts,

pairs of springs interposed between said last mentioned ends and said lugs, and

tioned ends and said lugs, pinions meshmg wlth said internal :gears, and means. for

meansfor driving said cup shaped members. V

3. Ina tractor the combination of a Sta tionary shaft, driving wheels rotatabljy mounted on said shaft, cup-shaped members mounted for yielding movement on the hubs of said driving wheels, internal gears formed within the margins of said cup shaped members, pairs oflugs on the outside of said cup-shapedmembers, bolts connecting said pairs of lugs, pairs of rigid members attached at their outer ends to the rims of said driving wheels and slidably mounted at the1r inner endsuponsaid bolts, pairs of springs interposed between said last mentioned ends and said lugs, pinions meshing with said internal gears, and means for driving said pmions.

4:. In a tractor the combination of a shaft,

pairs of lugson the 'outside ofsaid cupshaped members, bolts connectingsaid pans of lugs, pairs of rods attached at-their outer upon said bolts, pairs of springs interposed between sald last mentioned ends and said lugs, pinions meshing with; said internal gears, 'and means for driving said pinions. J

5. In a tractorthe'combinati'on of a sta-. t1onary shaft, dr1vingwvhce1s rotatably mounted onsaid shaft, cup shaped members mounted for yieldingmovementon the hubs of said driving wheel s, internal gears formed within the margins of said cup shaped members, covers fitting the margins of said cup-shaped members, said covers it having recesses-in their peripheries, packing in said recesses, pairs of lugs on the outside of said cup shaped members, bolts connect ing said pairs of lugs, pairs of rods attached at their outer endsto the rims of'said driving wheels and havingangular inner ends slldably mounted upon said bolts, palrs of springs interposed between said last mendriving said pinionsr In testimony whereof I hereunto afiix my signature.

LAURIT'Z r. NIELSEN.

ends to the rims of said driving wheels and having angularj inner ends shdably mounted, 

